Pneumatic drill



Z. LAMBERT. PNEUMATIC DRI L I APPLICATION FILED MAIL 20, I918.

f0 Patented May 11,1920.

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v PNEUMATIC DRILL. APPLICATIION FILED MAR 20, I918.

Patented May 11, 1920.

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Z. LAMBERT.

PNEUM ATIC DRILL.

APPLICATION FILED MAR- 20. I918.

Patented May '11, 1920.

3 SHE ET$-SHEET 5d 17272 Laval? UNITED STATES PATENT orrroa.

znPHmIN- LAMBERT, or GRAND MERE, QUEBEC, CANADA, ASSIGNOR To J. E.

MoIz UGHLIN, or GRAND MERE, QUEBEC, CANADA.

rNEUnATIc DRILL.

Specification of Letters Patent. Patented DIay 11, 1920,.

Application filed March 20, 1918. Serial No. 223,559.

To all whom it may concern: "Be it known that I, ZIEPHIRIN LAMBERT,

a subject of the King of Great Britain, re-' The present invention relates to drills and more particularly to devices of this character which are equipped with a motor for driving the drill, and an ob'ect of the present invention is to provi e a pneumatic motor attachment for drills which can be easily and readily installed and transported from place to place. I

A further object of the present invention is to provide a device of this character wherein the several parts thereof may be readily assembled or disassembled for replacing worn parts and one which will be efiicient and durable in operation.

With the above and other objects in view which will hereinafter appear asthe description continues, the invention consists of the novel features of construction, combination and formation of parts as will be hereinafter more fully described and par.-

' ticularly pointed out in the appended claims.

In the accompanying drawings has been shown a simple an preferred orm of the invention, it being, however, understood' that no limitation is necessarily made to the precise structural details herein exhibited, but the ri ht is hereby reserved to any changes, a terations or modifications to which recourse may be had that come within the scope of the claims without departing from the spirit of the invention or sacrificing the efliciency of the same.

In the accompanying drawings:

Figure 1 is a side elevation of one form of the device embodying the present invention;

Fig. same;

2 is a horizontal section through the Fig. 3 is a detail sectional'view of the rotor;

Fig; 4 is' a vertical section through a slightly modified :form of the invention When it is in operation the t .Formed with it are oppositel Fig. 5 is a detail sectional view of the controlling valve;

Fig. 6 is a side elevation of another sli htly modified form of the invention; an a i Q Fig. 7 is a vertical transverse section throu h the same. I

Re erring now more. particularly to the accompanying drawings wherein like and corres onding parts-are designated b similar re erence characters throughout-t e several views,

The drill as shown in Figs. 1 and 2 of the drawings comprises a casing 1 preferably made of cast iron having a cover 2 and a depending bearing portion 3. Eccentrically arranged within the casing 1 and journaled' within the bearings 3 and 4 is a shaft carrying a rotor 5 and connected to the lower end of this shaft is a drill-chuck 6 whereby different sized drills may be readily connected or disconnected. Seated within the Casing 1 is a removable ring 7 preferably made of bronze and is so mounted within the casing that it may be easily and readily removed so that a new one may be substituted therefor when it becomes worn or broken. This bearing ring 7 constitutes amain constructional element of the whole device herein described. disposed openings adapted to be engaged y the inlet and outlet conduits of the motor. Another opening is also formed within said ring and is adapted to be engaged bythe auxiliary exhaust or outlet conduit 24.

Now,',taki-'ng the ring as a basis for assembling the different parts of the machine together :.1st, The casing 1 is adapted on the outer periphery of said ring, care being taken to have the openings in said ring coincide with those correspondingly formed within the casing. The inlet and exhaust conduits are then connected and adjusted so as to engage said openings. Finally, the rotary iston 5 with its depending propeller b ades 22 and piston rod 44 is eccentrically mounted wit covg 2 then bein properly admsted over theffopening, the evice is read for action. rust of the piston rod is totally'taken up and. (provided for by an end thrust bearing 29, as escribed herein, within which is journaled and piv- 'otally mounted the portion of the piston rod in the ring, and, the

projecting out from the lateral face of piston and oppositely located to the portion of said piston rod journaled within bearing 3 and adapted for action with the drill-chuck. Said end thrust bearing may be provided with ball bearings or other similar means for reducing frictional contact. Also formed with the casing 1 are the internally threaded projections 8 and 9 respectively. Connected to the projection 8 is an inlet pipe 10 which supplies air under pressure to the casing 1 for driving the rotor 5. This inlet pipe 10, as better shown in Fig. of the drawings, has arranged therein a partition 11 for dividing the inlet pipe into the sections 12 and 13. Communicating with the sections 12 and 13 are the ports 14 and the latter being formed vWithin the pipe 10. Slidably mounted upon the pipe is a tubular sleeve 15 and the outer peripher of this sleeve is milled so as to provide a andle. The inner periphery of this sleeve 15 has formed a recess 16 which is adapted to bring the ports 14 into communication therewith. Formed within the sleeve 15 is'a diagonal arcuate slot 17 and extending through this slot is a set screw 18 andthe latter'is permanently fixed within the pipe 10. From this it is obvious that by turning the sleeve 15'the ports 14 will be brought into communication, so that the air under pressure may be supplied to the motor and when these ports 14 are brought into communication the sleeve 15 assumes the position as' better illustrated in Fig. 2. By sliding and turning the sleeve upon the pipe 10 it will assume the position as better shown in Fig. 5, wherein the ports 14 are out of communication and the air supplied to the motor is cut off. The, sliding and rotary movement of the sleeve 15 is limited by means of the 'slot and screw connection 17 and 18 respectively.

Leading from the projection 9 is an exhaust pipe 19 and encircling this exhaust pipe is a handle 20 which also has its outer periphery milled as better shown in Fig. 1. The outlet end of the .pipe 19 is provided with a perforated partition 21 whereby the exhaust air will be split up and muffled before entering the atmos here.

The rotor 5 is provi ed with a plurality of radial slots and slidably mounted within each of these slots is a blade 22. These blades 22 are normally retained in an expandible' position by means of the coil springs 23 as shown in Fig. 3 of the drawingsl As the air under pressure enters the casing 1 it strikes against the blade 22 thereby causing the rotor 5 to move and subsequently the air will exhaust through the exhaust pipe 19. Due to the great speed of the rotor 5 a considerable amount of the air Within the casing 1 has not time enough to pass into the pipe 19, and therefore I provide an auxiliary exhaust 24. This auxiliary exhaust may be eliminated by providing a groove within the inner periphery of the ring 7 and this groove communicating with the pipe 19 so that the air may escape totally through the pipe 19. By increasing or decreasing the size of this auxiliary outlet 24 the speed of the rotor may be controlled.

From the foregoing it is obvious that by grasping the handles 15 and 20 the drill may be readily placed upon its work and the motor will be absolutely under control of the operator by turning the handle 15. Therefore no valves are necessary for regulating the supply of compressed air to the motor.

Referring to Fig. 4 of the drawings, I have illustrated a slightly modified form of the invention whereby it is desired to reduce the number of revolutions per minute of the drill, so that the strength of the drill will be greatly increased. The casing -1 is slightly increased in height and has formed therein a partition 25 and upon this partition the rotor 5 is mounted. The cover 26 is provided with a depending flange 27 which is in threaded engagement with the casing 1 and acts in the same capacity as the ring 7. The shaft 28 of. the rotor is journaled within the partition 25 and has a detachable thrust bearing 29 which .is retained within the internally threaded projection 30 of the cover 26. The outer periphery of this projection 30 is also threaded so that a suitable handle may be connected thereto when it is desired to apply pressure in a vertical direction upon the drill. The lower end of the shaft 28 has connected thereto a pinion 31 and this pinion is adapted to mesh with a larger gear wheel 32 keyed to the vertical shaft 33 and the latter being journaled within the artition 25 and the bottom 34 of the caslng 1.

Also carried by the shaft 33 is a pinion 35 which is adapted to mesh with a gear 36 and the latter is carried b the shaft 37 to which is connected the dril -chuck 6.

From this construction it will be apparent that as compressed air enters the casing 1 therotor will be caused to rotate and in turn the drill-chuck 6 will be rotated at a very much reduced speed.

In the form of the invention as shown in Figs. 6 and 7 of the drawings, 1 have illustrated wherein this device may be applied to. A suitable base orplatform 38 is herein shown and connected a stationary support.

yond both sides of the casing 1 and may have connected. thereto emery Wheels 42 as shown, or any other suitable devices which require rotation.

From this construction it is obvious that the device may be mounted upon a stationary support, or it may be transported when desired and manually controlled.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent is:

1. The combination with a pneumatically driven rotary motor, comprisin r a cylindrical casing open at one end, a caring portion for one end of piston rod eccentrically formed with the closed-end of said casing,

- a cover having formed therewith a bearing portion for the other end'of said piston rod, diametrically opposed hollow projections formed with said cylindrical casing and adapted for connection, on the one hand,

with an inlet air pipe provided with valve means for regulating the flow of motive fluid within the motor, on the other hand with an exhaust pipe, an auxiliary out-let air exhaust, a rotary piston carrying slidable propeller blades, said piston rigidly mounted on a rod or shaft, of an anti-friction metal bearing ring in relation with which each of the other parts comprising the device herein described are adapted for communication and adjustment.

2. The combination with a pneumatically driven motor, comprising a cylindrical casing open at one end, a bearing portion for one end of piston rod eccentrically formed with closed end of said casing, a cover for said casing having formed therewith a hearing portion for the other end of said piston rod, diametrically opposed hollow projections formed with said cylindrical casing and adapted for connection, on the one hand, with an inlet air pipe provided with valve means for regulating the'flow of motive fluid within the motor, on the other hand, with an exhaust pipe, an auxiliary outlet air exhaust, a rotary piston carrying slidable propeller blades, said piston rigidly mounted on a rod or shaft, an anti-friction metal bearing ring to which adhere all other parts composing the device herein described, of an end thrust bearing adapted for location and adjustment within the projection eccentrically formed with the cover of said device, said bearing being susceptible to regulation by hand so as to effectively and totally take up the thrust of the piston rod at any time when said device is in operation.

In witness whereof I have hereunto set my hand.

ZEPHIRIN LAMBERT.

Witnesses:

J. E. MCLAUGHLIN, A. BORDELEAU. 

